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3 years ago

9

A newspaper ad includes a telephone number 1-555-dial vsw. How many seven letter arrangements are possible for the phone number

using the 26 letters of the alphabet of no letter is ised more than once? Express your answer using scientific notation.

1 answer:

trapecia [35]3 years ago

7 0

Let u be the set of all words containing 7 letters(26 letters to the power 7)

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